fix: mobile url cell focusnode fix

[Xazin]

• When you press on a URL cell, no matter where in the internal padding of the cell, the textfield will be focused

PR Checklist

• My code adheres to AppFlowy's Conventions
• I've listed at least one issue that this PR fixes in the description above.
• I've added a test(s) to validate changes in this PR, or this PR only contains semantic changes.
• All existing tests are passing.

[codecov]

Codecov Report

Attention: 6 lines in your changes are missing coverage. Please review.

Comparison is base (c659cf4) 54.55% compared to head (6730c55) 54.58%.
Report is 3 commits behind head on main.

Files	Patch %	Lines
...ation/database/card/row/cells/mobile_url_cell.dart	0.00%	6 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4029      +/-   ##
==========================================
+ Coverage   54.55%   54.58%   +0.02%     
==========================================
  Files         685      684       -1     
  Lines       31763    31754       -9     
==========================================
+ Hits        17329    17333       +4     
+ Misses      14434    14421      -13     

Flag	Coverage Δ
appflowy_flutter_integrateion_test	52.98% <0.00%> (+0.02%)	⬆️
appflowy_flutter_unit_test	9.69% <0.00%> (+<0.01%)	⬆️

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